Home / 13,119.98-18,105.56-7,151.64

Finding the Fourth Proportional to 13,119.98, 18,105.56 and 7,151.64

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Solution

The fourth proportional to 13,119.98, 18,105.56 and 7,151.64 is: 9,869.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,119.98 : 18,105.56 = 7,151.64 : x
  2. Step 2: Convert to fraction form
    13,119.98/18,105.56 = 7,151.64/x
  3. Step 3: Cross multiply
    13,119.98x = 18,105.56 × 7,151.64
  4. Step 4: Simplify right side
    13,119.98x = 129,484,447.12
  5. Step 5: Solve for x
    x = 129,484,447.12/13,119.98
  6. Step 6: Final answer
    x = 9,869.26

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.